mm: Adjust do_pages_stat() so gcc can see copy_from_user() is safe

Slightly adjust the logic for determining the size of the
copy_form_user() in do_pages_stat(); with this change, gcc can see
that the copying is safe.

Without this, we get a build error for i386 allyesconfig:

/home/hpa/kernel/linux-2.6-tip.urgent/arch/x86/include/asm/uaccess_32.h:213:
error: call to ‘copy_from_user_overflow’ declared with attribute
error: copy_from_user() buffer size is not provably correct

Unlike an earlier patch from Arjan, this doesn't introduce new
variables; merely reshuffles the compare so that gcc can see that an
overflow cannot happen.

Signed-off-by: H. Peter Anvin <[email protected]>
Cc: Brice Goglin <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
LKML-Reference: <[email protected]>

0 files changed, 0 insertions, 0 deletions